Cunningham, W. P., Cunningham, M. A., & Saigo, B. W. (2005). Environmental science: A global concern (8th ed.). McGraw-Hill Higher Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCunningham, William P., Mary Ann Cunningham, और Barbara Woodworth Saigo. Environmental Science: A Global Concern. 8th ed. Boston: McGraw-Hill Higher Education, 2005.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCunningham, William P., et al. Environmental Science: A Global Concern. 8th ed. McGraw-Hill Higher Education, 2005.
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